August weather forecast and climate
Arcadia, CA

Weather in August

The last month of the summer, August, is another hot month in Arcadia, California, with temperature in the range of an average high of 88.2°F (31.2°C) and an average low of 64.8°F (18.2°C).

Temperature

August is the warmest month, with an average high-temperature of 88.2°F (31.2°C) and an average low-temperature of 64.8°F (18.2°C).

Heat index

The average heat index in August is calculated to a hot 90.7°F (32.6°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'feels like', 'real feel', or 'felt air temperature', is a measure that combines both air temperature and relative humidity into a single value that indicates how hot the weather feels. Additional factors like activity, pregnancy, differences in body mass, height, and shape, and metabolic differences affect individual temperature impact. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

In August, the average relative humidity is 48%.

Rainfall

In Arcadia, California, during August, the rain falls for 2.6 days and regularly aggregates up to 0.16" (4mm) of precipitation. Throughout the year, there are 48.7 rainfall days, and 7.48" (190mm) of precipitation is accumulated.

Daylight

The average length of the day in Arcadia, California, is 13.4h.

Sunshine

In Arcadia, California, the average sunshine in August is 12h.

UV index

Months with the highest UV index are June through September, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: In August, the average maximum UV index of 6 translate into the following recommendations:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the warmest month in Arcadia?

August is the warmest month in Arcadia, California, with an average high-temperature of 88.2°F (31.2°C) and an average low-temperature of 64.8°F (18.2°C).

What is the temperature in August in Arcadia?

In Arcadia, California, in August, the average high-temperature is 88.2°F (31.2°C), and the average low-temperature is 64.8°F (18.2°C). In August, the average heat index (a.k.a. 'real feel', 'feels like'), that represents influence of the relative humidity to air temperaure, is calculated to 90.7°F (32.6°C).

What is the average humidity in August in Arcadia?

In Arcadia, the average relative humidity in August is 48%.

How many days does it rain in August in Arcadia?

In August, in Arcadia, California, the rain falls for 2.6 days. Throughout August, 0.16" (4mm) of precipitation is accumulated.

How many hours of daylight does Arcadia have in August?

In August, the average length of the day is 13.4h.

How many hours of sunshine does Arcadia have in August?

In August, the average sunshine is 12h.

What is the month with the highest UV index in Arcadia?

June through September, with an average maximum UV index of 6, are months with the highest UV index.

How high is the UV index in August in Arcadia?

In Arcadia, the average daily maximum UV index in August is 6. A UV Index reading of 6 to 7 represents a high hazard to health from the exposure to the Sun's UV radiation.

Average temperature in August
Arcadia, CA

Average temperature in August - Arcadia, CA
  • Average high temperature in August: 88.2°F

The warmest month (with the highest average high temperature) is August (88.2°F).
The month with the lowest average high temperature is December (62.1°F).

  • Average low temperature in August: 64.8°F

The month with the highest average low temperature is August (64.8°F).
The coldest month (with the lowest average low temperature) is December (46.2°F).

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Average pressure in August
Arcadia, CA

Average pressure in August - Arcadia, CA
  • Average pressure in August: 29.89"

The month with the highest atmospheric pressure is January (30.11").
The month with the lowest atmospheric pressure is June (29.88").

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Average wind speed in August
Arcadia, CA

Average wind speed in August - Arcadia, CA
  • Average wind speed in August: 4.6mph

The windiest month (with the highest average wind speed) is April (5.8mph).
The calmest month (with the lowest average wind speed) is September (4.4mph).

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Average humidity in August
Arcadia, CA

Average humidity in August - Arcadia, CA
  • Average humidity in August: 48%

Months with the highest relative humidity are March, May and June (56%).
The month with the lowest relative humidity is November (46%).

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Average rainfall in August
Arcadia, CA

Average rainfall in August - Arcadia, CA
  • Average rainfall in August: 0.16"

The wettest month (with the highest rainfall) is December (1.54").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days in August
Arcadia, CA

Average rainfall days in August - Arcadia, CA
  • Average rainfall days in August: 2.6 days

The month with the highest number of rainy days is March (6.5 days).
The month with the least rainy days is June (1.3 days).

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Average daylight in August /
Average sunshine in August
Arcadia, CA

Average daylight in August / Average sunshine in August - Arcadia, CA
  • Average daylight in August: 13.4h

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 9.9h).

  • Average sunshine in August: 12h

The month with the most sunshine is July (Average sunshine: 12.1h).
Months with the least sunshine are January, February and December (Average sunshine: 6.9).

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Average sunshine days in August
Arcadia, CA

Average sunshine days in August - Arcadia, CA
  • Average sunshine days in August: 26.2 days

The month with the most sunshine days is June (27.7 days).
The month with the least sunshine days is February (22 days).

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Average UV index in August
Arcadia, CA

Average UV index in August - Arcadia, CA
  • Average UV index in August: 6

Months with the highest UV index are June, July, August and September (UV index 6).
The month with the lowest UV index is December (UV index 3).

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Average cloud cover in August
Arcadia, CA

Average cloud cover in August - Arcadia, CA
  • Average cloud cover in August: 5

Months with the most cloud cover are March and December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 5).

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Average visibility in August
Arcadia, CA

Average visibility in August - Arcadia, CA
  • Average visibility in August: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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